Anybody been given verbal warning or been fired at their job?

Last week I received a verbal warning from my boss because I didnt tell him that I was gona be away from my desk all day for working on a project. To me it seems quite harsh as I worked my ass off that day all for no point as I got a warning for "unprofessional behaviour". Apparently his boss put heat on him because he didnt know where his staff was and my boss took it out on me.

Anyone else been given a warning at work or been fired at work?